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Vector Group Of Transformer


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I would like to ask if anyone knows the vector group of distribution transformer used in Korea?




In one application, I realize that the transformer secondary side (LV) is delta instead of star with neutral solidly earthed. The line voltage is 220V.




Currently for most of their control applications (plc and relay control), they are using 2 phase supply which is 220V. In our country the single phase supply is 230V at 50Hz.




I would like to ask if I can supply 230V single phase to the control system instead of 220V 2 phase?











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